NOTICE OF
CANCELLATION
INCH-POUND
A-A-50494
NOTICE 1
27 November 2002
COMMERCIAL ITEM DESCRIPTION
EXHAUST HEAD, STEAM
Commercial Item Description A-A-50494, dated 16 April 1990, is hereby canceled without
replacement. Exhaust heads manufactured using this CID are no longer used or required.
Custodians:
Navy - AS
Air Force - 99
DLA - CC
CIVIL AGENCY COORDINATING ACTIVITY:
Review activities:
Navy – SH, SA
Air Force – 70, 71
Preparing activity:
DLA – CC
GSA-FSS
(Project 4730-2226)
AMSC N/A
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
FSC 4730
A-A-50494
16 April 1990
SUPERSEDING
MIL-E-18435C
16 April 1980
COMMERCIAL ITEM DESCRIPTION
EXHAUST HEAD, STEAM
The General Services Administration has authorized the use of this Commercial
Item Description (CID) in preference to Military Specification MIL-E-18435C.
Abstract. This description covers exhaust heads made of cast iron or steel,
for moisture and oil entrapment and discharge of exhaust steam into the
atmosphere.
Salient characteristics:
1. Sizes. Sizes shall be as specified in table I for the size of exhaust
inlet required.
TABLE I.
Sizes.
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³
Size 1
1-inch inlet connection.
³
³
Size 1-1/2 1-1/2 inch inlet connection.
³
³
Size 2
2 inch inlet connection.
³
³
Size 2-1/2 2-1/2 inch inlet connection.
³
³
Size 3
3-inch inlet connection.
³
³
size 4
4-inch inlet connection.
³
³
Size 5
5-inch inlet connection.
³
³
Size 6
6-inch inlet connection.
³
³
Size 8
8-inch inlet connection.
³
³
Size 10
10-inch inlet connection.
³
³
Size 12
12-inch inlet connection.
³
³
Size 14
14-inch inlet connection.
³
³
Size 16
16-inch inlet connection.
³
³
Size 18
18-inch inlet connection,
³
³
Size 20
20-inch inlet connection.
³
³
Size 24
24-inch inlet connection.
³
³
Size 30
30-inch inlet connection.
³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³Beneficial comments (recommendations, additions, deletions) and any pertinent³
³data which may be of use in improving this document should be addressed to: ³
³Commanding Officer (Code 156), Naval Construction Battalion Center, Port
³
³Hueneme, CA 93043-5000, by using the self-addressed Standardization Document ³
³Improvement Proposal (DD Form 1426) appearing at the end of this document or ³
³by letter.
³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
DISTRIBUTION STATEMENT A. Approved for public release; distribution is
unlimited.
A-A-50494
2. Design and performance. Exhaust heads shall satisfactorily remove
entrained moisture and oil from exhaust steam, and shall satisfactorily
suppress exhaust noise. Removal of entrainment shall be affected by both
deflection and expansion of steam. Means shall be provided within the
exhaust head for collecting oil and moisture and preventing these liquids
from rejoining and escaping with the steam. The volume of the receiver shall
be adequate to allow rapid expansion of the steam for effective separation of
entrainment. The area of the exhaust porting shall be as large or greater
than the area of the inlet connection in order to minimize back pressure.
3. Rating. Recommend exhaust head ratings shall be not less than indicated in
table II and steam discharged to atmosphere at this rating shall not contain
more than 0.5 percent moisture at the exhaust opening.
Table II.
Exhaust head ratings.
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³
Recommended minimum rating in
³
³Inlet connections
pounds of steam per hour
³
³ Size in inches
at atmospheric pressure (14.7 PSIA)³
ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³
1
160
³
³
1-1/2
340
³
³
2-1/2
900
³
³
3
1,800
³
³
4
2,400
³
³
5
3,600
³
³
6
5,400
³
³
8
9,500
³
³
10
14,000
³
³
12
22,000
³
³
14
31,000
³
³
16
44,000
³
³
18
52,000
³
³
20
66,000
³
³
24
94,000
³
³
30
145,000
³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
4. Inlet connection. Exhaust heads in size 4 inch and smaller shall have
taper pipe threaded connections. Exhaust heads in size 5 inch and larger
shall be furnished with flange connection.
5. Drain connection.
Drains shall be adequate to carry off all entrainment.
6. Material. The material used in the manufacturer of exhaust heads shall be
steel or cast iron, suitable, for the purpose intended.
2
A-A-50494
Contractor certification. The contractor shall certify, and maintain
substantiating evidence that the product offered meets the salient
characteristics of this CID, and that the product conforms to the producer's
own drawings, specifications, standards, and quality assurance practices.
The Government reserves the right to require proof of such conformance prior
to first delivery and thereafter as may be otherwise provided for under the
provisions of the contract.
Metric products. Products manufactured to metric dimensions will be considered
on an equal basis with those manufactured using inch-pound units, provided they
fall within specified tolerances using conversion tables contained in the
latest revision of Federal Standard FED-STD-376, and all other requirements of
this CID are met.
If a product is manufactured to metric dimensions and those dimensions
Exceed the tolerances specified in the inch/pound units, a request should be
made to the contracting officer to determine if the product is acceptable.
The contracting officer has the option of accepting or rejecting the
product.
Regulatory requirements. The offeror/contractor is encouraged to use recovered
materials in accordance with Public Law 94-580 to the maximum extent
practicable.
Preservation, packaging, packing and marking. Preservation, packaging,
packing, labeling, and marking shall be as specified in the contract or order.
Notes. Purchaser should specify quantity and size of exhaust head required
for a specific procurement.
Types I, and II of MIL-E-18435C are not used in this document.
cast iron may be provided at suppliers option.
Steel or
FED-STD-376 is available from the Naval Publications and Forms Center,
5801 Tabor Avenue, Philadelphia, PA 19120-5099.
MILITARY INTEREST:
PREPARING ACTIVITY:
Custodian
Navy - YD
Navy - YD
(Project 4730-1179)
3